Error in nova.conf

[Francisco Gimeno]

After installing:

Configurando nova-common (2012.1~e2~20111202.11641-0ubuntu1) ...
Usage: nova-manage [options]

nova-manage: error: --force_dhcp_release option does not take a value
dpkg: error al procesar nova-common (--configure):
 el subproceso instalado el script post-installation devolvió el código de salida de error 2

....
nova.conf
-----
--dhcpbridge_flagfile=/etc/nova/nova.conf
--dhcpbridge=/usr/bin/nova-dhcpbridge
--logdir=/var/log/nova
--state_path=/var/lib/nova
--lock_path=/var/lock/nova
--force_dhcp_release=True
--use_deprecated_auth
--iscsi_helper=tgtadm
--verbose
----

The "--force_dhcp_release=True" option should be just "--force_dhcp_release".